Faith in Guru and Surrender to Kṛṣṇa
89
Śrī Kṛṣṇa Himself declares that simply by knowing the science of Kṛṣṇa, Arjuna would not be subject to illusion ( yaj jñātvā na punar moham ). If we have a very good ship, we can easily cross the Atlantic Ocean. At present we are in the midst of the ocean of ignorance, for this material world has been likened to a great ocean of nescience. Therefore Lord Caitanya Mahāprabhu prayed to Kṛṣṇa in this way:
ayi nandatanuja kinkaram 
    patitam mām viṣame bhavāmbudhau 
    kṛpayā tava pāda-pankaja- 
    sthita-dhūtīsadṛśam vicintaya
“O son of Mahārāja Nanda, I am Your eternal servitor, and although I am so, somehow or other I have fallen into the ocean of birth and death. Please pick me up from this ocean of death and fix me as one of the atoms at Your lotus feet.” ( Śikṣāṣṭakam , 5)
If we have the boat of perfect knowledge, there is no fear, for we can cross the ocean very easily. Even if a person is most sinful, if he receives the boat of the science of Kṛṣṇa, he can cross the ocean very easily. As stated before (Bg. 4.36), it does not matter what we were in our past lives. Because we were in ignorance, we may have committed so many abominable actions. Indeed, no one can say that he is free from sinful activity. But according to  Bhagavad-gītā , this does not matter. Just by knowing the science of Kṛṣṇa, one becomes free.
It is therefore absolutely necessary that we seek knowledge, and the perfection of knowledge is to understand Kṛṣṇa. Today there are so many theories,